Spi Registers - Texas Instruments C28 Series Student Manual

SPI Registers

SPI-A Configuration Control Register
OVERRUN INT ENABLE
C28x - Communications
SPICCR @ 0x007040
15-8 7 6
reserved
SPI SW RESET
0 = SPI flags reset
1 = normal operation
SPI-A Operation Control Register
SPICTL @ 0x007041
0 = disabled
1 = enabled
15-5
reserved
CLOCK PHASE
0 = no CLK delay
1 = CLK delayed 1/2 cycle
5-4 3
reserved
character length = number + 1
e.g. 0000b ⇒ length = 1
1111b ⇒ length = 16
CLOCK POLARITY
0 = rising edge data transfer
1 = falling edge data transfer
MASTER/SLAVE
0 = slave
1 = master
4 3 2
0 = transmission disabled,
1 = transmission enabled
Serial Peripheral Interface (SPI)
2 1 0
SPI CHAR.3-0
SPI INT ENABLE
0 = disabled
1 = enabled
1 0
TALK
output pin hi-Z'd
11 - 7